[mirror_ubuntu-focal-kernel.git] / drivers / input / mouse / amimouse.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Amiga mouse driver for Linux/m68k
 *
 *  Copyright (c) 2000-2002 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Michael Rausch		James Banks
 *	Matther Dillon		David Giller
 *	Nathan Laredo		Linus Torvalds
 *	Johan Myreen		Jes Sorensen
 *	Russell King
 */


#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/irq.h>
#include <asm/setup.h>
#include <linux/uaccess.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Amiga mouse driver");
MODULE_LICENSE("GPL");

static int amimouse_lastx, amimouse_lasty;

static irqreturn_t amimouse_interrupt(int irq, void *data)
{
	struct input_dev *dev = data;
	unsigned short joy0dat, potgor;
	int nx, ny, dx, dy;

	joy0dat = amiga_custom.joy0dat;

	nx = joy0dat & 0xff;
	ny = joy0dat >> 8;

	dx = nx - amimouse_lastx;
	dy = ny - amimouse_lasty;

	if (dx < -127) dx = (256 + nx) - amimouse_lastx;
	if (dx >  127) dx = (nx - 256) - amimouse_lastx;
	if (dy < -127) dy = (256 + ny) - amimouse_lasty;
	if (dy >  127) dy = (ny - 256) - amimouse_lasty;

	amimouse_lastx = nx;
	amimouse_lasty = ny;

	potgor = amiga_custom.potgor;

	input_report_rel(dev, REL_X, dx);
	input_report_rel(dev, REL_Y, dy);

	input_report_key(dev, BTN_LEFT,   ciaa.pra & 0x40);
	input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
	input_report_key(dev, BTN_RIGHT,  potgor & 0x0400);

	input_sync(dev);

	return IRQ_HANDLED;
}

static int amimouse_open(struct input_dev *dev)
{
	unsigned short joy0dat;
	int error;

	joy0dat = amiga_custom.joy0dat;

	amimouse_lastx = joy0dat & 0xff;
	amimouse_lasty = joy0dat >> 8;

	error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
			    dev);
	if (error)
		dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);

	return error;
}

static void amimouse_close(struct input_dev *dev)
{
	free_irq(IRQ_AMIGA_VERTB, dev);
}

static int __init amimouse_probe(struct platform_device *pdev)
{
	int err;
	struct input_dev *dev;

	dev = input_allocate_device();
	if (!dev)
		return -ENOMEM;

	dev->name = pdev->name;
	dev->phys = "amimouse/input0";
	dev->id.bustype = BUS_AMIGA;
	dev->id.vendor = 0x0001;
	dev->id.product = 0x0002;
	dev->id.version = 0x0100;

	dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
	dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
	dev->open = amimouse_open;
	dev->close = amimouse_close;
	dev->dev.parent = &pdev->dev;

	err = input_register_device(dev);
	if (err) {
		input_free_device(dev);
		return err;
	}

	platform_set_drvdata(pdev, dev);

	return 0;
}

static int __exit amimouse_remove(struct platform_device *pdev)
{
	struct input_dev *dev = platform_get_drvdata(pdev);

	input_unregister_device(dev);
	return 0;
}

static struct platform_driver amimouse_driver = {
	.remove = __exit_p(amimouse_remove),
	.driver   = {
		.name	= "amiga-mouse",
	},
};

module_platform_driver_probe(amimouse_driver, amimouse_probe);

MODULE_ALIAS("platform:amiga-mouse");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* Amiga mouse driver for Linux/m68k
	4	*
	5	* Copyright (c) 2000-2002 Vojtech Pavlik
	6	*
	7	* Based on the work of:
	8	* Michael Rausch James Banks
	9	* Matther Dillon David Giller
	10	* Nathan Laredo Linus Torvalds
	11	* Johan Myreen Jes Sorensen
	12	* Russell King
	13	*/
	14
1da177e4 LT	15
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/input.h>
	19	#include <linux/interrupt.h>
314c926f	20	#include <linux/platform_device.h>
1da177e4 LT	21
	22	#include <asm/irq.h>
	23	#include <asm/setup.h>
7c0f6ba6	24	#include <linux/uaccess.h>
1da177e4 LT	25	#include <asm/amigahw.h>
	26	#include <asm/amigaints.h>
	27
	28	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	29	MODULE_DESCRIPTION("Amiga mouse driver");
	30	MODULE_LICENSE("GPL");
	31
1da177e4	32	static int amimouse_lastx, amimouse_lasty;
1da177e4	33
314c926f	34	static irqreturn_t amimouse_interrupt(int irq, void *data)
1da177e4	35	{
314c926f	36	struct input_dev *dev = data;
1da177e4 LT	37	unsigned short joy0dat, potgor;
	38	int nx, ny, dx, dy;
	39
b4290a23	40	joy0dat = amiga_custom.joy0dat;
1da177e4 LT	41
	42	nx = joy0dat & 0xff;
	43	ny = joy0dat >> 8;
	44
	45	dx = nx - amimouse_lastx;
	46	dy = ny - amimouse_lasty;
	47
	48	if (dx < -127) dx = (256 + nx) - amimouse_lastx;
	49	if (dx > 127) dx = (nx - 256) - amimouse_lastx;
	50	if (dy < -127) dy = (256 + ny) - amimouse_lasty;
	51	if (dy > 127) dy = (ny - 256) - amimouse_lasty;
	52
	53	amimouse_lastx = nx;
	54	amimouse_lasty = ny;
	55
b4290a23	56	potgor = amiga_custom.potgor;
1da177e4	57
314c926f GU	58	input_report_rel(dev, REL_X, dx);
314c926f GU	59	input_report_rel(dev, REL_Y, dy);
1da177e4	60
314c926f GU	61	input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40);
	62	input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
	63	input_report_key(dev, BTN_RIGHT, potgor & 0x0400);
1da177e4	64
314c926f	65	input_sync(dev);
1da177e4 LT	66
	67	return IRQ_HANDLED;
	68	}
	69
	70	static int amimouse_open(struct input_dev *dev)
	71	{
	72	unsigned short joy0dat;
314c926f	73	int error;
1da177e4	74
b4290a23	75	joy0dat = amiga_custom.joy0dat;
1da177e4 LT	76
	77	amimouse_lastx = joy0dat & 0xff;
	78	amimouse_lasty = joy0dat >> 8;
	79
314c926f GU	80	error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
	81	dev);
	82	if (error)
	83	dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
1da177e4	84
314c926f	85	return error;
1da177e4 LT	86	}
	87
	88	static void amimouse_close(struct input_dev *dev)
	89	{
314c926f	90	free_irq(IRQ_AMIGA_VERTB, dev);
1da177e4 LT	91	}
1da177e4 LT	92
314c926f	93	static int __init amimouse_probe(struct platform_device *pdev)
1da177e4	94	{
72155615	95	int err;
314c926f	96	struct input_dev *dev;
72155615	97
314c926f GU	98	dev = input_allocate_device();
314c926f GU	99	if (!dev)
2e5b636b DT	100	return -ENOMEM;
2e5b636b DT	101
314c926f GU	102	dev->name = pdev->name;
	103	dev->phys = "amimouse/input0";
	104	dev->id.bustype = BUS_AMIGA;
	105	dev->id.vendor = 0x0001;
	106	dev->id.product = 0x0002;
	107	dev->id.version = 0x0100;
1da177e4	108
314c926f GU	109	dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	110	dev->relbit[0] = BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	111	dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) \|
7b19ada2	112	BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);
314c926f GU	113	dev->open = amimouse_open;
	114	dev->close = amimouse_close;
	115	dev->dev.parent = &pdev->dev;
1da177e4	116
314c926f	117	err = input_register_device(dev);
72155615	118	if (err) {
314c926f	119	input_free_device(dev);
72155615 DT	120	return err;
72155615 DT	121	}
1da177e4	122
314c926f GU	123	platform_set_drvdata(pdev, dev);
314c926f GU	124
1da177e4 LT	125	return 0;
	126	}
	127
314c926f	128	static int __exit amimouse_remove(struct platform_device *pdev)
1da177e4	129	{
314c926f GU	130	struct input_dev *dev = platform_get_drvdata(pdev);
314c926f GU	131
314c926f GU	132	input_unregister_device(dev);
	133	return 0;
	134	}
	135
	136	static struct platform_driver amimouse_driver = {
	137	.remove = __exit_p(amimouse_remove),
	138	.driver = {
	139	.name = "amiga-mouse",
314c926f GU	140	},
314c926f GU	141	};
d3d25808	142
e492fe27	143	module_platform_driver_probe(amimouse_driver, amimouse_probe);
314c926f GU	144
314c926f GU	145	MODULE_ALIAS("platform:amiga-mouse");